Hettner, A. (1929). Der Gang der Kultur über die Erde.
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Chicago Style (17th ed.) Citation
Hettner, Alfred. Der Gang Der Kultur über Die Erde. Leipzig, Berlin, 1929.
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MLA (9th ed.) Citation
Hettner, Alfred. Der Gang Der Kultur über Die Erde. 1929.
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Warning: These citations may not always be 100% accurate.